Soil Xenobiology is a technology on the Diplomacy and Trading technology tree with a research cost of 40 
. It unlocks one Star System Improvement and one Planetary Exploitation and allows further research in Particle Scanning.
"Studies of soil samples from other planets plus advances in understanding of extremophilic bacteria permit scientists to create, under certain conditions, hardier and more productive crops."
Note[]
For the Harmony, researching this technology instead allows further research in Particle Scanning, Botanical Scanning, and Xenology.
Sustainable Farms[]
- +1
per on Arctic - +1 per on Desert
- +1 per on Arid
- +1 per on Tundra
- -2 on improvement
Cost: 97.5 
"Advances in soil biology have opened the gate to new, low-impact farming methods that reduce the need for water, fertilizer, and sunlight. In addition, crops will be able to grow in extremes of temperature and soil quality."
Silic Soils (Harmony)[]
- +1 per on Planets
Cost: 80
"The Harmony are unlike other peoples, including in their dietary needs. While they learn to turn living matter into energy forms that provide sustenance, that process is accelerated when there are higher proportions of silicates in the soil. In guiding agricultural exploitation in this direction, they can efficiently improve food production."
Alien Grafting[]
- +2 per on Terran
- +2 per on Planet
- +1 per on Ocean
- +1 per on Jungle
Cost: 52
"A first step in creating hardy, sustainable (and non-toxic) local crops is to integrate known genomes and physiological adaptations into alien ecologies. Using advanced biochemical techniques, combinatorial genetics of known and alien plant types, new and relatively harmless produce can be joined."